Finding the Third Proportional to 419,390 and 897,555

Step by Step Solution

1. Step 1: Write the proportion equation
   419,390 : 897,555 = 897,555 : x
2. Step 2: Convert to fraction form
   419,390/897,555 = 897,555/x
3. Step 3: Cross multiply
   419,390x = 897,555 × 897,555
4. Step 4: Simplify right side
   419,390x = 805,604,978,025
5. Step 5: Solve for x
   x = 805,604,978,025/419,390
6. Step 6: Final answer
   x = 1,920,896.96